Lexical Definition

‎ἀκαθαρσία‎ akatharsía (ak-ath-ar-see'-ah) impurity ^G:N-F
from ‎ἀκάθαρτος‎

uncleanness.

• impurity (the quality), physically or morally

Abbott-Smith

ἀκαθαρσία, -ας, ἡ (< ἀκάθαρτος), [in LXX chiefly for טֻמְאָה, טָמֵא;]
uncleanness, impurity,
(a) physical (MM, VGT, s.v.): Mt 23:27;
(b) moral: Ro 1:24 6:19, II Co 12:21, Ga 5:19, Eph 4:19 5:3, Col 3:5, I Th 2:3 4:7.†

Abbott-Smith References

Liddell-Scott-Jones

ἀκαθαρσία-σία, ἡ,

uncleanness, foulness, of a wound or sore, [Refs 5th c.BC+]

__b dirt, filth, [Refs 1st c.BC+]
__2 in moral sense, depravity, [Refs 4th c.BC+]
__3 ceremonial impurity, [LXX]

_{LSJ Scripture Refs: LXX.Lev.15.3}